EXHIBIT 32.1

Certification of Chief Executive Officer

Pursuant to Section 906 of the Sarbanes-Oxley Act Of 2002

(18 U.S.C. § 1350)

In connection with the Quarterly Report of Basin Water, Inc. (“the Company”) on Form 10-Q for the period ended March 31, 2009 (the “Report”), I, Michael M. Stark, Chief Executive Officer of the Company, certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. §1350), that:

1)	to my knowledge, the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2)	the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.


Date: May 22, 2009	BY:	/s/ MICHAEL M. STARK
		Michael M. Stark
		Chief Executive Officer

The foregoing certification is being furnished solely to accompany the Report pursuant to 18.U.S.C.1350, and is not being filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and is not to be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing. A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission of its staff upon request.

Basin Water, Inc. 10-Q